Winter is Coming
While these novels might not all be set in the winter, their dark, brooding, maybe even claustrophobic natures make them perfect to read by the fire, under a blanket, or with a cup of tea. 

All of Us Murderers by KJ Charles
All of Us Murderers
by KJ Charles

When Zeb Wyckham is summoned to a wealthy relative's remote Gothic house on Dartmoor, he finds all the people he least wants to see in the world - his estranged brother, his loathsome cousins, and his bitter ex-lover, Gideon Grey. Nothing, he is certain, could possibly be worse. Then the grizzled old patriarch announces the true purpose of the gathering: He intends to leave the vast family fortune to whichever of the men marries Cousin Jessamine, setting off a violent scramble for her hand and his wealth. 
The House on Biscayne Bay by Chanel Cleeton
The House on Biscayne Bay
by Chanel Cleeton

With the Great War finally behind them, thousands of civilians and business moguls alike flock to South Florida with their sights set on making a fortune. When wealthy industrialist Robert Barnes and his wife, Anna, build Marbrisa, a glamorous estate on Biscayne Bay, they become the toast of the newly burgeoning society. Anna and Robert appear to have it all, but in a town like Miami, appearances can be deceiving, and one scandal can change everything. 
One of Us Knows: A Thriller by Alyssa Cole
One of Us Knows: A Thriller
by Alyssa Cole

Years after a breakdown and a diagnosis of dissociative identity disorder derailed her historical preservationist career, Kenetria Nash and her alters have been given a second chance they can't refuse: a position as resident caretaker of a historic home. Having been dormant for years, Ken has no idea what led them to this isolated Hudson River island, but she's determined not to ruin their opportunity. 
Midnight Rooms by Donyae Coles
Midnight Rooms
by Donyae Coles

England, 1840. Orabella Mumthrope spies an unexpected visitor in her uncle's parlor. Scruffy in appearance yet claiming to be the scion of a fabulously wealthy family, Elias Blakersby declares a deep desire to make Orabella his wife. An outsider with no fortune or connections, Orabella never expected to marry. But her uncle has many debts, and Orabella agrees. The new bride is whisked away to Korringhill Manor, the Blakersby family estate, and far from everything she knows. Expecting splendor, Orabella is shocked to find decay, skittish servants, and curt elders. But her kind new husband's loving touch, promises of a happy life together, and his assurances she'll never want for anything soothe her concerns. Yet there is a darkness deep within this house--
Cape Fever by Nadia Davids
Cape Fever
by Nadia Davids

From award-winning South African author Nadia Davids comes a gothic psychological thriller set in the 1920s, where a young maid finds herself entangled with the spirits of a decaying manor and the secrets of its enigmatic owner. 
A Haunting on the Hill by Elizabeth Hand
A Haunting on the Hill
by Elizabeth Hand

A struggling playwright--Holly Sherwin--her musician girlfriend, and a few friends find a creepy old mansion on an isolated hill from which to rehearse Holly's most ambitious play. Ignoring the red flags about the house and setting, the friends soon find themselves fighting each other--and the house itself.
The Heiress by Rachel Hawkins
The Heiress
by Rachel Hawkins

New York Times bestselling author Rachel Hawkins returns with a twisted new gothic suspense about an infamous heiress and the complicated inheritance she left behind.
The Djinn Waits a Hundred Years by Shubnum Khan
The Djinn Waits a Hundred Years
by Shubnum Khan

Akbar Manzil was once a grand estate off the coast of South Africa. Nearly a century later, it stands in ruins: an isolated boardinghouse for eclectic misfits, seeking solely to disappear into the mansion's dark corridors. Except for Sana. Unlike the others, she is curious and questioning and finds herself irresistibly drawn to the history of the mansion: To the eerie and forgotten East Wing, home to a clutter of broken and abandoned objects--and to the door at its end, locked for decades.
The Bewitching by Silvia Moreno-Garcia
The Bewitching
by Silvia Moreno-Garcia

While researching a forgotten horror writer, a graduate student uncovers a disturbing link between a vanished schoolgirl, a sinister novel, and her great-grandmother's eerie childhood tales, leading her to suspect that an ancient, malevolent force still lingers in the halls of her university.
Midnight Is the Darkest Hour by Ashley Winstead
Midnight Is the Darkest Hour
by Ashley Winstead

In her small hometown, librarian Ruth Cornier has always felt like an outsider, even as her beloved father rains fire-and-brimstone warnings from the pulpit at Holy Fire Baptist. Unfortunately for Ruth, the only things the townspeople fear more than the God and the Devil are the myths that haunt the area, like the story of the Low Man, a vampiric figure said to steal into sinners' bedrooms and kill them on moonless nights. When a skull is found deep in the swamp next to mysterious carved symbols, Bottom Springs is thrown into uproar.